The document discusses the concept of an iceberg, where only 10% is visible above the waterline and 90% remains below the surface, invisible. This is analogous to human beings, where only a small portion of our knowledge, skills, attitudes, values, beliefs and motives are visible to others, while most remain unseen below the surface. Maintaining a positive attitude is emphasized as being one of the most important factors for success and happiness, along with acquiring knowledge and skills through hard work. Several quotes on the power of having a positive mindset are provided.